US539730A - Furnace for burning ores - Google Patents

Description

2 Sheets-Sheep Y S E R .0 mm m DR LU AB m TUE -.0 FA N R U P. m 0 M 0 w No. 539,730. Patented May 21', 1895.

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FURNACE FOR BURNING ORBS. I No. 539,730. I Patented May 21, 1895.

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NITED STATES FFICE.

ATENT FURNACE FOR BURNING ORES.

SPECIFICATION forming part of Letters Patent No. 539,730, dated May 21,1895.

Application filed August 7, 1894.

To all whom it may concern.-

Be it known that I, FREDnRrc J OHN FALD- ING, a citizen of the United States, residing at Cleveland, in the county of Ouyahoga and State of Ohio, have invented certain new and useful Improvements in Furnaces for Burning Ores; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in furnaces for burning ore, and the invention consists in the construction of a furnace substantially as shown and described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a horizontal sectional View, in plan, on a line corresponding substantially to 1 1, Fig. 3, and showing sets of ore-burning furnaces in two parallel series. Fig. 2 is a vertical sectional elevation taken substantially on line 2, 2, Fig. 3, and disclosing especially the internal construction ofthe air or antiradiatin g jacket which envelops the furnace about its sides and ends. Fig. 3 is a vertical cross-section, in elevation, of one of the several separate furnaces and a part of another at its side on a line corresponding substantially to z 2, Figs. 1 and 2.

The foregoing views show the several furnaces, A, in each of the parallel series, as

seen in Fig. 1, and these furnaces each have individual doors a, grate bars b-, and discharge or flue openings .c in their top and rear, opening into a common passage or flue din the middle partition wall D between the two series of furnaces.

I have found that there is an expensive waste of heat by absorption and radiation through the walls, when the old fashioned wall alone is used, and hence I have supplemented the solid wall E, which is the equivalent of the usual wall, with a jacketed wall or jacket, G, built up therewith at both the sides and the ends of the furnace. This jacket G is composed'of hollow fire brick, hollow tiles, or other suitable material, constructed and laid to form practically a continuous air jacket, and at the same time afiording a series of parallel vertical air channels g. These air channels extend from the top to Serial No. 519,671. (No model.)

the bottom of the furnace, and, preferably, are divided off as to the several furnaces in each series, so that each furnace has its own sub-division ofthe said air channels. Thus, referring to Fig. 2, I see a longitudinal passage h along the top of the jacket with division walls k at intervals crossing and closing said passage. This wall is an outward extension of the walls L located between the furnaces in each series, and also traverses the air passage Z at the bottom of channels -g. The said airpassage Z- discharges at one end through the outlet m into the furnace beneath the grate. Both the top passage -hand the bottom passage Z, parallel thereto, are common to all the vertical channels g+ for each furnace; and the top passage is designed to be in open communication with the outer air through the I opening 0- or its equivalent. Valve or damper mechanism may be employed at the opening --0, or in the air passages, to control or entirely out off the flow of air to each furnace.

By the foregoing construction of wall,I accomplish two objects, namely, the loss of heat by. radiation through thewalls of the furnace, and the heating of the air to supply combustion. In other words, the heat that would be lost by radiation is taken up by the inflowing air through the outside jacket and delivered back to the furnace.

One or more separate furnaces may be built on this plan, and the construction of the fur nace or the use thereof is not material, provided that it be capable of taking this improvement.

A further advantage in the construction of this furnace is that the air channels surrounding the burners can be arranged to permit the heated air to escape into the atmosphere, and be replaced by cool air slowly, rendering it possible to diminish the temperature in the furnace; an arrangement which is of great value in burners when a certain degree of heat is required to be maintained.

Having thus described my invention, what I claim is 1. An orefurnace having thefront wall thereof constructed with a series of hollow tiles arranged side by side in front of the fire brick and extending from the top thereof down to a plane with the grate bars, the fire brick be- I side vertically and an inlet passage for air to hind said tiles a passage common to all said said tiles and a dischargepassage forthe air tiles at their bottom and having an opening into the said furnaces beneath the grate, subdischarging beneath the grates, and the front stantially as set forth. [5 5 plate of the furnace in front of said tiles, Witness my hand to the foregoing specifisubstantially as set forth. cation.

2. A set of ore furnaces having their fronts FREDERIO JOHN FALDING.

opposite to one another and a wall common to all said furnaces and separating them at their Witnesses:

10 rear, and an outside Wall about the said fur- H. A. FRENCH,

naces consisting of hollow tiles placed side by J. H. O. MOQUILKIN.

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